A man indicted on murder and kidnapping charges in the death of his on-again, off-again girlfriend went to a party after her death, driving her car, police said.

Vincent George Brown Jr., 39, is serving 13 months in a state prison for violating his probation in an unrelated drug case. Tampa police have a warrant to charge him in the Nov. 15 strangulation of Jennifer Johnson, 31.

A grand jury indicted Brown on felony first-degree murder and kidnapping charges Thursday. The indictment was unsealed today because of the arrest warrant...